South Korean financial markets reopen Monday after the Chuseok break with investors facing higher global borrowing costs, volatile energy prices and continued strength in semiconductor shares. The KOSPI last closed at 7,080.92 on Sept. 23, up 0.9% for the day and 2.7% over the shortened week, as gains in Samsung Electronics and SK Hynix helped extend the index’s rally.

Conditions shifted while Seoul was closed. The U.S. 10-year Treasury yield rose from 5.11% on Sept. 23 to 5.17% on Sept. 25, while the 30-year yield climbed from 5.45% to 5.54%. Brent crude settled at $104.32 per barrelon Friday